I've been to several Psychiatrists for 20 yrs, they mostly all said ADHD- Bi-polar. My problems?

... consist of being to down, head feeling heavy, no concentration, can't think clear cause my mind is or feels like it's racing in circles, very unsociable when I get around people I feel tense can't open my mouth to say anything and finding myself looking at the floor. Memory isn't better either. I used to be happy and smile all the time but can't figure out what medicine will work the best for me. I have a very very high metabolism which meds wear off immediately. I want to focus, concentrate, make better decisions, be more sociable around people, feel happier, but not to happy(amped) does any1 know what would be good? Ty all for reading this